Some cards allow a player to take actions with them from their opening hand. Once the mulligan process (see rule 103.5) is complete, the starting player may take any such actions in any order. Then each other player in turn order may do the same.
May 3, 2019 · War of the Spark
In a Planechase game, the starting player moves the top card of their planar deck off that planar deck and turns it face up. If it’s a phenomenon card, the player puts that card on the bottom of their planar deck and repeats this process until a plane card is turned face up. The face-up plane card becomes the starting plane. (See rule 901, “Planechase.”)
January 25, 2019 · Ravnica Allegiance
In a Planechase game, the starting player moves the top card of their planar deck off that planar deck and turns it face up. If it's a phenomenon card, the player puts that card on the bottom of their planar deck and repeats this process until a plane card is turned face up. The face-up plane card becomes the starting plane. (See rule 901, "Planechase.")
April 27, 2018 · Dominaria
In a Planechase game, the starting player moves the top card of their planar deck off that planar deck and turns it face up. If it’s a phenomenon card, the player puts that card on the bottom of their planar deck and repeats this process until a plane card is turned face up. The face-up plane card becomes the starting plane. (See rule 901, “Planechase.”)
May 1, 2014 · Journey into Nyx
In a Planechase game, the starting player moves the top card of his or her planar deck off that planar deck and turns it face up. If it’s a plane card, that card is the starting plane. If it’s a phenomenon card, the player puts that card on the bottom of his or her planar deck and repeats this process until a plane card is turned face up. (See rule 901, “Planechase.”)
February 1, 2014 · Born of the Gods
In a Planechase game, the starting player moves the top card of his or her planar deck off that planar deck and turns it face up. If it’s a plane card, that card is the starting plane. If it’s a phenomenon card, the player puts that card on the bottom of his or her planar deck and repeats this process until a plane card is turned face up. (See rule 901, "Planechase.")
July 1, 2012 · Magic 2013
In a Planechase game, the starting player moves the top card of his or her planar deck off that planar deck and turns it face up. If it's a plane card, that card is the starting plane. If it's a phenomenon card, the player puts that card on the bottom of his or her planar deck and repeats this process until a plane card is turned face up. (See rule 901, "Planechase.")
September 30, 2011 · Innistrad
In a Planechase game, the starting player moves the top card of his or her planar deck off that planar deck and turns it face up. (See rule 901, "Planechase.")
July 15, 2011 · Magic 2012
In a Planechase game, the starting player moves the top card of his or her planar deck off that
June 17, 2011 · Commander 2011
In a Planar Magic game, the starting player moves the top card of his or her planar deck off that
April 1, 2011 · Duel Decks: Knights vs. Dragons
In a Planar Magic game, the starting player moves the top card of his or her planar deck off that planar deck and turns it face up. (See rule 901, "Planar Magic.")
February 4, 2011 · Mirrodin Besieged
In a Planar Magic game, the starting player moves the top card of his or her planar deck off that planar deck and turns it face up. (See rule 901, “Planar Magic.”)
October 1, 2010 · Scars of Mirrodin
In a Planar Magic game, the starting player moves the top card of his or her planar deck off that
February 1, 2010 · Worldwake
In a Planar Magic game, the starting player moves the top card of his or her planar deck off that planar deck and turns it face up. (See rule 901, "Planar Magic.")